Plaster of a volm layer detailed technical characteristics

Having in details talked about plaster products of the leader of KNAUF Rotband to "the German quality", we pass to the leader of the Russian production and plaster mix produced for drawing manually – a volma a layer which technical characteristics we present in article.

Description and properties of plaster of a volm

The enterprise producing plaster dry mixes (further CC) – Volma, exists more than 70 years. The products are developed by the Russian technologists. In a line a number of plasters with mineral knitting, one of which – plaster Volma a layer. This structure contains more than 90% of plaster.

As well as in the CC other producers, this mix contains (except plaster) the skhvatyvaniye terms increasing plasticity, increasing, adhesion the modifying additives. Of course, producers CC do not report a compounding, but bring to our attention on packing with the brand of a volm a layer technical characteristics.

It is information, necessary for plasterers, at material selection. On the basis of these data count the need for raw materials, make flow charts, carry out plastering of walls.

As the knitting substance plaster is applied since very old times. In fact it is the natural stone deprived in the course of water dehydration, processed for increase in the area of contact. Meeting water, plaster napityvatsya greedy by it, passes into a condition of solution, and crystallizes, forming an artificial stone.

Plaster solutions with plaster binding apply when it is necessary:

• to level a basis surface (draft plaster);
• to omonolitit joints and openings;
• to protect materials of structures of the building from influence from the outside (a protective cover);
• to decorate an interior (decorative function).

Unfortunately, plaster coverings turn out less strong, than cement and sand. They are also unstable in water that limits use of plaster solutions only to internal works, or finishing of the glazed loggias.

However advantages of plaster in:

• ease (the small weight gives smaller load of the basis that is important, for example, for ceilings);
• shrink resistance (apply where the basis – weak materials);
• bigger plasticity (the lack of sand filler, allows to bring a surface to high degree of smoothness);
• placeability which allows to fill completely successfully even narrow cracks;
• comforts of feeling of the people who are in rooms with plaster finishing;
• to materials of walls it is free to opportunity to breathe;
• high adhesion;
• to big thickness of the covering which is not demanding reinforcing (the volma guarantees a possibility of creation of layer of a covering up to 6 cm thick for once).

Expense on 1 sq.m of a wall

In practice the plastered walls, partitions or ceilings are far from flatness. On filling and alignment of large cavities, cracks, joints more mix can be required. More test is required also for the columns bent, for example, and also other curvilinear surfaces. You can also use ours online the calculator for calculation.

Besides, correctness of preparation, the water plaster ratio (affecting density of solution), experience of the plasterer – important factors which also have an impact on the size of an expense.

Even if a wall surface carefully to measure, calculate covering volume to within the 100-th sign after a comma, the estimated need for dry mix will be only approximate. Therefore plaster material get 15-20% with a stock.

Plaster of a volm layer technical characteristics

Various CC Volma companies have a different compounding and, therefore, various technical characteristics. For example, a volma a layer as well as a volma layer – the plaster mixes having plaster as binding are similar, but have differences.

Their main difference – quality of the received surface (the first mix is used for receiving a surface suitable for coloring without additional shpaklevaniye). At identical contents as a part of plaster of mix differ in additional components that affects characteristics.

For example, distinguishes their such technical parameter as an amount of water, required for a zatvoreniye:

• the volmaplast for cultivation of 1 kg of mix needs 450-500 ml;
• the volma a layer demands 600-650 ml on powder kg.

If to plaster a volm layer, the solution consumption on sq.m will be 1-2 kg higher. On the other hand – the high price of a volm of a layer.

We provide the table with key parameters which are necessary at material selection.

Table. Plaster of a volm layer of 30 kg technical characteristics

Composition of mix

In stroymarketa except plaster structures it is possible to meet pure plaster powder. However, at a zatvoreniye its water, pure plaster differently, than solution of plaster mix behaves. For example, alabaster "rises" in 5-10 minutes after cultivation by water, construction plaster keeps longer – up to 25 minutes.

This time is obviously not enough for plaster works. To prolong the period of life of plaster solution, enter delay mechanisms into the list of CC. Thanks to them, a volma the layer begins to grab not earlier than 45 minutes from the beginning of a zatvoreniye. The skhvatyvaniye in 180 minutes from the moment of cultivation comes to the end. Such prolongation allows to put and form mix even in case the beginner is engaged in plastering.

Except these additives, the mineral and polymeric substances increasing "stickiness" (adhesion), placeability (plasticity) are entered into structure.

Expiration date and storage conditions

Important characteristic of construction mixes – an expiration date. Artificially received material – powder of the dehydrated plaster – insufficiently resistant form which seeks to pass into steadier state, involving moisture from air.

Powder storage conditions in an original packing – the dry room with ventilation, positive temperatures. Measures for protection against hit on the material of direct beams of the sun put on a pallet have to be taken. If packing was opened, and CC – did not use everything, then it is necessary to pack the remains hermetically.

How many dries

This characteristic – floating. The plastered surfaces should be dried up under natural conditions (without heat guns and the similar equipment). Speed of evaporation of excess water is identical to a layer of 3 mm or 60 mm (a surface one), and it is more "surplus" of water in the second case.

Therefore the layer of a plaster covering, depending on its thickness, conditions indoors and other factors dries. According to the management, full drying of a layer 10 mm thick – 7 days, in reality coverings can dry quicker or longer.

Layer thickness

There are allowed and optimum sizes. So, the minimum layer – 2 mm is allowed. On the video by Andrey Shayter conditions and technology of drawing a layer by spaces practically for zero are shown.

However it is necessary to adhere to parameters at which the producer guarantees trouble-free operation. So minimum allowed layer thickness – 3 mm, maximum allowed – 60 mm. On average at alignment adhere to optimum thickness – 5-30 mm.

Adhesion and durability

Cement can only envy ability of plaster to stick to the bases from different materials. Actually, plaster plaster easily clings to slightly rough materials. And the last modification a volma-layer allows to apply solution without preliminary priming. However masters recommend to ground the basis and under this mix.

The matter is that priming solve several problems. For example, strengthening of the weak basis and also fixing of particles of dust. In case of drawing a thick layer on the smooth concrete basis it is better to apply betonokontakt. At a thickness of a covering close to minimum, priming for the purpose of increase in adhesion is not necessary.

Construction plaster happens different durability. From what brand plaster is used by producers for CC, plaster durability depends. Also durability increases when using modifiers. Volma guarantees durability: on a bend – it is not lower than 1 MPa, and on compression – it is higher than 2 MPas.

Frost resistance and water absorption

Plaster plaster maintains in dry conditions fall of temperature to – 40 ^{° C}. The upper temperature bound of operation – ^+60os. It and also the fact that mix water absorption low, allows to apply a volm a layer to plastering of the glazed balconies. Optimum mode: +5 – ^+30os.

Heat conductivity

As plaster coverings melkoporist, and a time lower a heat transfer in the thickness of material, heat conductivity of plaster on the basis of plaster is lower, than at cement coverings. Usually at the density 800kg/m3 to - t of heat conductivity of plaster plaster – 0.3. It depends also on additives in structure.

Release form

Packing of mix in craft bags weighing 25 or 30 kg is popular. If the need for solution for plastering is less, or the smaller amount of dry powder is required, then it is possible to get CC in bags weighing 15 kg. The minimum weight – 5 kilograms.

Shades

Usual color CC – white or gray. Also pinkish, yellowish or greenish colors meet. It – not dyes, and the color of natural raw materials depending on presence at a natural stone of some inclusions which do not affect working qualities of plaster solution. However, if the finishing finishing "translucent", for example, thin paper wall-paper, then is better to choose white structures for "substrate".

• concrete walls;
• gypsum-fiber plates (GVL);
• gypsum cardboard;
• plasters with cement and limy binding;
• gas concrete;
• plates and blocks plaster;
• brick;
• foam concrete.

Mix is applied to alignment of ceiling overlappings, partitions and walls on condition of normal or dry humidity indoors. It is applied in case the planned finishing finishing – painting, a tile, wall-paper or decorative plaster.

The reader studied plaster structure of the Russian production – a volma a layer. Technical characteristics will help not only when choosing, but also when performing calculations, for example, how many it is necessary to get CC. Data will also help to dispose correctly with material (temperature conditions, skhvatyvaniye time, what is the time it is possible to store raw materials).